Please do not be alarmed. White spot on the face may simply be due to nutritional deficiency. There are a few more differential diagnosis and proper prescription is possible only after diagnosis. It is better that you send a pic or visit a local Homeopath.

Hello.
You need to visit a homoeopathic physician or send photographs for diagnosis first. The diagnosis will help in telling you about the prognosis. Medicines can be prescribed after proper case study.
Regards

By proper guidance only you may get proper treatment as eating medicines from the counter is also hazardous as the diagnosis is unconfirmed i suggest you to consult homoeopath and the dr. will do the needful